Valve



June 27, 1950 w, [3 L NCEY 2,513,236

VALVE Filed May 50. 1945 INVENTOR Rap/l M DEL mvcs Y ATTORNEY Patented June 27, 1950 uN TEoursTAT s BATENT oercs Ralph W; De Lanc ey, Meriden, Conn, assignor to The Miller Company, Merid'en; Conn; a'col."po=

ration oficonnecti'eut eaw. we;

The present invention relates to alves, and

v ers'it'is common to keep the burner in ontinu-- Dl1$ operation by means of a 'pilot light which onsiimes a small but measured quantity of fuel andto Vary the heat obtainedfrorn'the burner by yarying the amount of, fuel fed to the burner. For reasons of safety careful restrictions have w k u f 'Kili" a i u QWWhiL can reach the burner; and misnow must at no time beencefeded. These re'gulatingvalyes are used with constant 1 v 1 vane which 'Ifia'intain The present invention contemplates" a metering' valve for these'purposes wherein it is" possible to obtain an adjustment of the a'ir'iountbf "f il u pnee for the pilot fire and to q tam an "adju tment 'of'the maximum ameu t oriuerm Be supplied for high fire, these two adjustments being susceptible of separate individual control Sdtha'tone can flowrat'e the ewer r ihoth puotjend high fire operation.

13 Claims. (01. 137--21)V,

2 l {in thesedrawings:

Figure 1- is* "ai"fragmentary sectional View thfrdiigha constant 1eve1 vaii e's owin'gith jmete'i- "iii'ghlalv elevation in thepositiori fijr "T'i'qui'efl is a top plan view of the structure of ,s v n i r m v 1 t Figure 3 is a side elevational View of the meterenuresis a Vrtieal' sectional View through the Accoiding to the present invention the "value m chani'js'in employs a reciprooator'y valve membe'i" spring" pressed toward "closed position and coaerauy'e" devices are carried'by the valve stern and the Valve casing so that when relative movegllht is attained betweenthefn the valve s'tem maybe moved away from the seat in measured 4 Ta ouiitsdepending upon the interengagemfefit of the dev c s; andcontrolled pilot ow' ig nre and"inte'rmediate flow rates maybe 013 ne d" ordingto the presentinvention there are wqmembers disposed on a common axis paral- 1e) with the axis" of the valve stem embe and each is capable of individual adjustment toward gage. In the"preferred embodimenthfthe invention these members are carried by the valve vices are carried by the fixed casing. It ie? howor awayfrom' the surface"with"wh ich it'is 'to 15' a constant head of fuel on the meteringwalve. A Y, "Figure 7 isa per Valve stem and "associated dam and follows? "Figure 5 -is"a sectional View on the 1ine15 5 and-step surfaces; and

"""Figures' 8"a'iid"9 are diagrammatic elevation'al arid plan views illustrating the"cdoperat ion'6f the'p'arlt's; U

The casing of a combined constant level'and metering" valve is indicated at I 0. The inlet alve is"indi'ca' tedat and parts of the constant le'iiel valve-m c anism iridicatedat'IB, l4. 'Thewalv'casing ID as an outlet value openin l5 provided witna y'alve'seat l6 arranged, for

means concentrie'w'ith the valve stein opening 2:01" This cam' means includes a low inactive portion 2I","a riser 22,'a rever'sely 'sloped surfac'in and a generallyhelioal' surface 24 which starts hem-a proximates the sameleyel as the bottom 'ofsurfacie 23 "and ascends at such a pitch "that thehigh pointzs is'a substantially higherle'v'el.

ever, entirely poss'ibleto embody the inv e'ntion in" "striioturs in whichthe relative movement istobta'inedby a reciprocable non-rotatable valve stein, thothr'devices being rotatable; f The accompanying drawings show, for purposes of illustrating the present invention, an 'e'mbodi-- 1 merit inwhiohth ilivntion may take iforrn, it

being understood tha't the drawings are illustra- .tii e'of the invention rather than limitiri'gthe 'Ihe upwalrdIy fa'cing'cam surfaceabruptly teri nihates f'as indicateda't 2s. 'I-h'e' valve niei r'iher "I1 is provided with a shoulder" 2-1 at" a lcarefully predetermined distah'be above'the' portionbi" the valVeTs'tein which 666p- 'erate'swith the valvefseat for apur'pb'se'tdbe -de'scr-ibedI 'Ihe Valve stein is again shouldered,

indicatedat 28, and carries a ring or genres approximately the same" diameter as'the "dutsideor 'tnnam Thisring 2'9 istapped as indicated at 30 to receive'a flanged member 3| the" uppfend of 'whichis provi'd d'with 's'rew slotsfiji' to facilitate adjusting mefr'ibei' arupjand rection and this will bring the follower against the riser causing the follower to climb,v the riser and push the valve stem toward open embodied 1 within the scope of the claims, 'I wish it to be a-understoodthat the particular form shown isw 3 down. The flange member is drilled and tapped as indicated to receive a screw 33. The members 3| and 33 are coaxial and the spacing of this axis from the valve stem axis is such as to be above a horizontal stop surface 34 inside the cam means. The head 35 of the screw 33 is slotted as indicated and has a flange 36 received under a flange 31 carried by a-tube 38 inwhich the valve stem is slidable. The tube 38 passes up through a bracket 39 supported from the bridge l9 and a coiled spring 40 is interposed between the bracket 39 and the flange 37. This coiled spring 40 presses downwardly on the flangeand holds the flange 31 against flange 36 and this in turn presses the valve stem downwardly toward the valve seat l6. It also keeps pressure on the screws 3| and 33 at all times and prevents'them from loosening in response to vibration no matter whether the valve is opened or closed.

The valve stem H can be turned on its axis by a conventional handle indicated at H. When the valve stem is in the position indicatedin full lines in Figures 5, 8 and 9 both flanged member 3| and screw 33 are above the surface 2| but not in contact with this surface, and the spring 40 holds the valve completely closed. Thevalve member can then be turned in a clockwise diposition. The hump, 22 between 22 and 23 raises the valve stem enough to have the lower screw will control flow of thefuel for. pilot.

After a short movement of the-pilot adjustment screw 33 along the surface 34 the flangeof the follower 3| will then reach the surface 24, and

thereafter this flange will ride up along this, cam surface causing the valve to open more and more until the high point is reached at 25.

In adjusting the valve stem it is turned to high fire position and the flanged member 3| adjusted to give the desired flow rate.

34 and this screw adjusted for the proper pilot rate. The flange 36 on the pilot screw hides the screw 3| andhinders tampering.

The valve, stem is then turned to bring screw 33 opposite The shoulder 2'1 abovereferred to is preferably :so located that the flange of the outer follower is not turned down far enough to reach this shoulder when it is moved to give the maximum flow permitted. Should one tamper with the valve and attempt to obtain a greater flow than;

should be had, it would be impossible to adjust the follower 3| but a very slight amount beyond the maximum permissible flow and hence the the valve stem backward and gives an indication 1 of where to stop for pilot. It, however, does not prevent turning the burner off by backward movement of the stem. If 22, 22, 23 were omitted, one could secure controlled pilot flow by first pulling the valve stem up and then turn! ing ituntil 33 rested on 34. i

Since it is obvious that the invention maybe in other forms and constructions but one of these forms, and various modifications and changes being possible, I do not otherwise limit myself in any way with respect thereto.

What is claimed is:

1. A valve for controlling flow of fuel to a burner, comprising a liquid fuel chamber having an outlet port, a. reciprocable and rotatable valve stem cooperating with the outlet port, a fixed member through which the valve stem passes, a fixed ream having a raised surfaceconcentric with the valve stem axis of varying spacing from the valve seat, the cam facing in the direction of the stem axis and having an inner diameter substantially greater than that of the valve stem opposite it so as to form an intervening annular space, a member fixedly carried by the valve stem adjacent the cam and having a threaded hole at a less radius than that of the ;;raised cam surface, a bushing threaded into the hole and having an annular flange at its end, the lower face of the'flange being opposite the raised cam surface throughout all positions of adjustment of the bushing in the threaded hole and of the valve stem about its axis, over the cam as the valve stem is turned, and spring means pressing the flange against the cam, the bushing being adjustable to vary the maximum valve opening which is available when the flange is in engagement with the most remote pointpfv the cam.

2. A valve as in claim 1, wherein the cam has a generally spiral portion occupying substantially less than 360 and a vertical return beyond the end of the cam, and the stem is rotatable to, allow the spring to close the valve after the member has been turned past the end of the cam.

3. A valve as in claim 1, wherein the top of the'bushing has an upwardly opening slot for an adjusting tool. 4. A valve as in claim 1, wherein the top of the bushing has an upwardly opening slot foiian adjustin tool, and having means to cover the slot to prevent tampering.

i .5. A valve as in claim 1, wherein the valve stem has a shoulder against which it is possible to bring the said flange, said shoulder providing an extreme limit of adjustment of the bushing whereby the maximum valve opening is fixed;

6. In a valve having a valve stem spring biased toward a valve seat, means for moving the valve stem upwardly as it is turned from a position where it is closed, comprising two coaxial elefments carried by the valve stem laterally of its axis and one having a threaded connection with the valve stem and an annular flange, the other being threaded in the first and protruding beyond it, a cam element concentric with the valve stem engageable by the flange and having a steep portion to lift the stem off its seat, a low portion allowing the stem to approach the seat andfa generally helical portion to move the valve stem to full open position for high fire, and a pilot fire control surface engageable by the protruding cam follower when the flange is oppositethe low portion.

7. In a fuel feed control valve, a liquid amber having an outlet valve seat, a cooperative ro- ,tatable and vertically reciprocable valve stem having two similarly facing spaced shoulders one larger than the other, a member fixed to 'the valve stem and positioned by one shoulder a'predetermined distance from the other shoulder,-:a fixed cam concentric with the valve stem-axis.

' the valve stem carried member having a vertical threaded hole at a distance from the valve stem axis intermediate the radii of the cam and larger shoulder respectively, a member threaded into said hole and having a flange engageable with the, cam, and a spring acting on the valve stem to urge the stem toward the seat and the fiange against the cam, the larger shoulder forming a stop limiting the adjustment of the threaded member and thereby providing a maximum possible valve opening when the flange is in engagement with the cam.

8. A valve mechanism for controlling flow of fuel to a burner, comprising aureservoir having a valve seat, a passage leading from the valve seat, a rotatable and vertically adjustable valve stem cooperable with the valve seat, spring means urging the valve stem toward closed position, two members having a common axis parallel with the valve stem axis, one being smaller than the other and protruding beyond it, each being adjustable along said common axis, a fixed stop at the radius of said common axis and engageable by g greater radius a steep valve stem lifting surface engageable with said larger diameter member to lift the valve stem off its seat and carry the smaller member above the stop, and a valve stem lowering surface to lower the stem to bring the smaller member against the stop.

10. A mechanism as in claim 8, wherein the valve stem has a shoulder which limits the adjustment of the larger of said members toward high fire position.

11. A valve mechanism for controlling the flow of fuel past a valve seat to a burner, comprising a valve stem spring biased toward closed position, a cam surface concentric with the valve stem axis, a cooperable cam follower adjustably carried by the stem, the stem and cam surface being relatively rotatable, the cam surface containing a steep portion to lift the valve stem off the seat and provide a predetermined low valve opening, a reversely sloped portion to permit the valve stem to move toward closed position, and

a generally helical portion to lift the valve stem to high fire position, and an adjustable stop carried by the rotatable element and engaging a surface on the fixed element for limiting the,

the pilot adjustment.

12. A valve for controlling the fioW of fuel to a burner, comprising a liquid fuel chamber having an outlet port,- a reciprocable and rotatable valve stem cooperable with the outlet port to close the same or provide a variable opening, a fixed member through which the valve stem passes, a fixed cam concentric with the valve stem axis and facing in the direction of the valve stem axis, a member fixedly carried in the valve stem adjacent the cam and having a threaded hole at a less radius than the cam, a member threaded into the hole and having its end movable over the cam as the valve stem is turned, the cam having an arcuate portion of variable spacing from the valve seat and engageable with the threaded member, and a portion so close to the valve seat as to be beyond the movement of the threaded member when the valve stem is seated, a pressure spring about the valve stem, and means to transmit the spring pressure through the said threaded parts so that the threads are under spring pressure irrespective of whether the threaded member is in engagement with the follower or the valve stem is seated.

13. A valve as in claim 12, wherein said pressure transmittin means includes a second threaded member threaded into the first, and the fixed member through which the valve stem passes is provided with a surface against which the second threaded member bears during a portion of the rotation of the valve stem. I

RALPH W. DE LANCE'Y.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,155,761 Johnson Apr. 25, 1939 2,301,041 Hann' e Nov. 3, 1942 2,315,171 Voorheis Mar. 30, 1943 

